Abstract
In the previous reports, abnormal phosphorous metabolisms were observed both in the stunt virusinfected rice plant and the virus transmitting-green rice leafhopper. This paper deals with the results obtained from the researches on the incorporation of P32 into the abnormal phosphorous metabolisms.
(1) The incorporation of P32 into various phosphorous fractions of rice plant or green rice leafhopper is lower as affected with the virus (Table 1-2).
(2) The autoradiograms on the incorporation of P32 into RNA and DNA show no difference between healthy and diseased rice plant or nonviruliferous and viruliferous leafhopper, as infected to the rice stunt virus (Fig. 1-2). The radioactivity of P32 in RNA-P of the diseased plant shows no difference from the healthy, and the radioactivity in DNA-P of the diseased is higher remarkably. But the radioactivity in RNA-P or DNA-P of the viruliferous insect is always found on higher level than that of the nonviruliferous.
(3) The acid soluble phosphorous compounds of the plant and the insect were fractionated by the method of LePage and Umbreit. The amounts of phosphorous contents and the radioactivities in the various fractions show no consistent difference between the healthy and diseased plant or the nonviruliferous and viruliferous insect (Table 3-4 & Fig. 3-4).
